Planck usually refers to Max Planck (1858–1947), a German physicist considered to be the founder of quantum theory. Planck may also refer to: Science Astronomy Planck (crater) Planck (spacecraft) Cosmology Planck units People with the surname Amalia Planck (1834–1908), Swedish entrepreneur Erwin Planck (1893–1945), German politician and resistance fighter Gottlieb Jakob Planck (1751–1833), German theologian and historian and grandfather of Max Planck Karl Christian Planck (1819–1880), German philosopher Nina Planck (born 1971), American food writer See also Max Planck Society, for the Advancement of Science Plank (disambiguation)